Trolley.



PATENTED SEPT. 24, 1907. G, R. PORSTER.

TROLLEY APPLICATION FILED/APB. 27, 1907.

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G. IMPORSTBR.

TROLLEY.

APPLICATION FILED APR.27,1907.

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GEORGE R. FORSTER, OFFITIIIAN, ILLINOIS.

TROLLEY.

Specification of Letters Patent.

Patented Sept. 24, 1907.

Application filed April 27, 1907. Serial No. 370,624.

of Vermilion Stateof Illinois, have invented certain new and useful improvements in Trolleys; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates tov improvements in apparatuses for controlling the movements of trolley poles for electric railways, and it has particular refer ence to an arrangement of devices, whereby the trolley isautomalically lowered as soon as it leaves the trolley wire, and is thereafter raised by the application of fluid pressure. I,

A further object of the invention resides in the provision of trip mechanism which is engaged with the stem ofthe piston located in the pressure chamber until the trolley leaves the trolley wire when the release of such mechanism will effect the actuation of the device for lowering the trolley pole.

With the above and other ends in view, the invention consists in the construction, combination, and arrangement of parts, all as hereinafter more fully described, specifically claimed, and illustrated in the ac companying drawings, in which like parts are designated by corresponding reference numerals in the several views: 7

Of the said drawings-Figure l is a side elevation of the trolleycontrolling apparatus. Fig. 2 is a longitudinal vertical section therethrough. Fig. 3 is a top plan view of Fig. l. Fig. 4 is an end.view-. Fig. 5 is a transverse vertical section taken on the line 5-5 oi Fig. 2. Fig. 6 is an enlarged detail view of the trip Inechanisml Fig. 7 is a transverse section taken on the line '7-7'of Fig. 2. I

In Fig. l a portion of an electricallypropelled vehicle is shown, upon the roof of which the trolley is mounted.

Referring more particularly to the drawings, the trolley, which is of the u'mlera'unning type, is shown-us mountedupon the roof of the vehicle 10 and as consisting in its essential parts of a pole ll, secured within a socketed holder J2 pivoledabout a horizontal axis to the trolley base l3 which last-ni ntioned element consists of an uppcrmelnherl l. and a lower member pivoted together, lhclowei member being fastened to the roof of the vehicle. I

The upper member id of the trolley-base is provided n'ilh a horizontal tubular cylinder 16, which is divided by a partition 17 into a pressure chamber 18 and a springreceiving chamber l9. 18 is a piston 20, whose stem 21 extends throughan axial opening in the closed end of said chamber, and carries on its outer end a cross-head 22. The pressure chamber is provided, adjacent the partition 17, with a port 23 communicating with one end of an air-pipe 24, whose opposite end is fitted in a hollow plug 25, which is tapped into the bolt 26, by means of which the base sections are pivoted together, said bolt being provided with a longitudinal bore having a lateral extension into which one end of a second air-pipe 27 is fitted, the'opposite end of said pipe being connected with a pipe 28, which is in turn connected with a source of fluid pressure (not shown). The pipes 27 and 28 are connected by a Tjoint having a rotatable plug 29 provided with an L-shaped valve passage, the plug being turned in one direction or the other by an operating handle. The opposite arm of the T-joint is connected with an aircscape pipe, with which the valve passage in the plug may be made to communicate. The pressure cham-. her is further provided with a leak hole 30, by means of which the speed of movement of the piston is regulated.

The pole holder 12 is providedupon its upper face with a pair of spaced cars 31, between which is disposed the enlarged end of a rod 32, which end is provided with a horizontal. perforation, alining with the perforations formed through said ears, the bolt upon which said rod is pivoted passing through the several perforations, as shown. The cars 31, above referred to, are connected by a reanvardly-extending contact plate 33, the free end of which is bolted to the holder, as shown in Fig. 2. The opposite end of the rod 32 carries a plate 34, against which bears one end of a heavy helical spring 35, the opposite end of which bears against a second plate 36, provided with an elongated axial opening 37, through which the rod 32 passes. Displacement of lhe plate 34 from said rod is prevented by a nut 38. The plate 36 is provided with a pair of diametrically opposite horizontal extensions 39, which project through aliuing slots 40 formed upon opposite sides of the chamber l9, and are connected to the adjacent ends of a pair of rods 41, whose opposite ends are fastened to the crosshead 22. The tubular cylinder 16 is further provided upon its upper face with a pair of vertical guides 42, having alining openings formed therethrough, in which Disposed within the chamber is slidably engaged a rod 43, one end ()f,.which is prO- vided with an eye 44, connected with one end of a pitinau 4-5, the opposite end of which ispivoted to one arm oi an angle-lever 46, the opposite arm of which is pivoted between a pair of cars 47, projecting laterally from the closed end of the pressure chamber 18 and discoil-spring 50, which embraces the rod 43 and bears at opposite ends against the forward guide 42 and a collar 51 carried by said rod, thus holding the eye end of said rod against the adjacent face of the guide above referred to. In such position, the spring 35.is compressed by the movement of the rods 4 l, which are connected to the crosshead 22 on the piston stem, the piston having been retracted by the action 01' the compressed air admitted through the port 23. W hen, however, the trol 10y leaves the trolley wire, the pole will swing up wardly by reason of the partial expansion of the spring 35, thus bringing the plate 33 into contact with the adjacent end oi the rod 43, moving the latter forwardly against the action of the spring 50, and releasing the linger ltl from the notch 48, thus permitting the complete expansion of the spring;- 35 with a resultant lowering of the trolley pole into position adjacent the car rooi', such expansion of the spring moving the cr ss hcad and piston connected thereto forwardly at the same tiinc. 'l'he' piston is then again rotracltui upon the admission oi compressed air to the pressure chamber whercupon the trolley pole will again be raised until its wheel is in contact with the trolley wire, the piston being retained in its retracted position through the automatic engagement of the linger 4!) in the notch 48.

The two members of the trolley base, which are pivoted together by the bolt 26, are preferably provided with races formed on their mutually adjacent faces in which antii'riction bearings oi any type are disposed, to

permit an easy rotary movement of the upper member of the base.

The contact plate 33, which is carried by the holder, is rendered capable of a slight angular adjustment by being formed of a pair of sections 52 and 53, which are pivotally connected together at their mutually-adja-' cent ends, the opposite end of the iirstanentionedsection being further provided with a perforated stud 54 pivotedthereto, the stud bolt 55 for retaining the stud in passing through the perforation therein and extending into an y one of a series of openings 56 formed in the adjacent lace ol' the holder.

What is claimed, is

1, in a trolley for electric railways, the combination oi a trolley base; a cylinder located upon said base and provided with a partition forming front and rear compartmcnis; u trolley-pole pivoted to said base: a rod pivoted to snlrl. role and extending inlo the rear compnrlmout; a coihspling carried by said rod; a lluid operated piston located within the front comparlmeni and connected with said spring-j for comp sing the latter to raise said pole; means adapted toenails-e said piston. to hold the spring in compressed,conditlon; and nlcnns for releasing said holding means from engagcnienl with said piston, to permit the spring to expand and lower the pole. i

. 4. in a trolley for 2. in a trolley for electric railways, the combination of a trolley base: a cylinder located upon said base and provided with a partition forming front and rear compartmenls; a trolley pole pivoted to said base; a rod pivoted to said pole and extending; into the r 11' collipartmenl'; n coil-sprin carried by said rod; a lluldoperated piston located within the front compartment and connected with said spring; for compressing the latter to raise said pole; trip mechanism carried by said cylinder and adapted to automatically engage said piston, to hold the spring in compressed condilion; and int-ans carried by said pole for releasing;- said trip mechanism from ongagenient with said piston, when the pole leaves the trolley wire, to permit the spring to expand and lower the pole,

3 in a trolley for electric railways, the combination with a trolley base and a trolley pole pivoted thereto, of

are disposed within said cylinder for raising said pole; means carried by said cylinder and adapted for automatic engagemcnt with said piston, to hold the pole in raised position1'autoimiticnlly operated means for releasing; said lastmcntioned means from engagement with said piston when the pole leaves the trolley wire; and means for automatically lowering the pole upon such release oi said holding means.

electric railways, the combination with a trolley bas and a trolley pole pivolcd thereto, ol' 'linder localcd upon said base; a fluid-operated piston ,osctl within said cylinder and connected with said pole. for raisins the latter; trip mechanism carried by said cylinder for auto: ically engaging said piston to maintain said pole in ruiscd position; means carried by said pollfor releasing said trip mechanism from engage lncnl with said pislon when the pole leaves the trolley wirc; and means disposed within said cylinder and corinccled with said pole for automatically lowering the latter upon the release of said trip mcchanismv .i. ln a trolley for electric rnilw' the combination with a trolley base and a trolley pole pivoted thereto, ol' :1 cylinder localcd upon said base; a iluill-opcratcd piston disposed within said cylinder and connected with said pole, for raising: the latter; a rod slidably mounted upon said cylinder: trip mechanism carried by said cylinder and connec :d with said rod for automatically engaging said piston, to maintain said pole in raised position; means carried by said pole and adapted to contact with 'id rod when the pole leaves the trolley wire for moving said rod endwise to release said trip mechanism from cue; nnent with said piston; and means disposed within said r indcr and connected wilh said pole for auloinalicnlly lowering the latter upon lhc release of said trip mechanism.

(iyln a trolley i'or clor-lric railways, the combination with a, trolley'hnsc and a trolley polc pivoled thereto. of a cylinder localcd upon said base; a llnid opcrnicd piston disposed wilhln said cylinder and connected witb said pole, for 'aisiny; the latter, said-piston having a notched stem; a rod slidably inonnled upon said cylinder; trip mechanism carried by said cylinder and connected with said rod; :1 coil-springcarried by "rid rod for normally forcing the laller rcurwardly of the .ylindcr, to cause the trip mechanism to automatically cue-nee the notched stem of the plstou when the latter is retracted, to maintain said pole in raised position; menus carried by said pole and adapted to contact with said rod wl the pole lcnvcsthc trolley wire for forcing said rod forw rdly oi' the cylinder -lcr upon the release of said trip mechanisnn I. In a trolley for clcctric railways. the combination with a trolley bu e, a pole holder pivoted thereto, and a pole carried by said holder, oi a cylinder located upon said base; a fluid-operated piston disposed within said cylinder and connected with said holder for raising the pole; a rod slidably mounted upon said cylinder; trip inder located upon said base; a fluid-operated piston K mechanism carried by said cylinder .and connected with said rod; :1 coil-sprlng carried by said rod for normally forcing the latter rearwardly of the cylinder, to cause the trip mechanism to automatically engage said piston when the latter is retracted, to maintain said pole in raised position; a plate carried by said holder and adapted to contact with said rod when the pole leaves the trolley wire, for forcing said rod forwardly of said cylinder, to disengage the trip mechanism from said piston; and

L Y means disposed within said cylinder and Jonnected with 10 said holder for automatically lowering the pole upon the disengagement of said trip mechanism.

In testimony whereof, I aflix my signature, in presence of two witnesses.

' GEORGE R. FORSTER. Witnesses WILLIAM C. Vammnvoon'r Tnno. TILLOTSON. 

